The issue are when the war started, everyone expected Ukraine to collapse in days or weeks. After Ukraine pushed Russia away from Kyiv in April, Ukraine's chances grew. Javelins ATGMs and other light helped by time. Then mobile artillery, HIMARS, and guided munitions bought more time and allowed for the Kharkiv and Kherson offensives. Tanks and aircraft in numbers require more personnel for training, maintenance, and are expensive to operate. To justify deploying long lead time weapons, there has to be enough time to deploy them.
The longer Russia does not win, the greater their chances of ultimately losing. To the US and Europe, Ukraine is in a sufficiently secure position where deploying tanks and planes is realistic.
Thank you, General Widget Jr.
Just kidding! That’s a rather reasonable take, I’ve got no argument with it in general.
I’m waiting for something decisive to happen but no way to know when or what that might be. Seems like a stalemate for now. I’ll be glad when we can stop spending material and money on it.